True ronin, I'm not against the F-18, especially carrier operations would be a great feature to add. I'm just thinking of importance of both planes. I just did a quick search and I found that the number built for F-18s is only 1480 compared to the 4450 units of the F-16s (if we can believe wikipedia), so I'm just thinking the F-16 would be more interesting since it is so widespread. Also the F-16 had quite some revisions over the years, so maybe it's easier to get real life info on the older blocks of F-16s.
I just hope it's not going to be an F-15 or F-14 (at least not yet). A fighter jet with A-A and A-G modes would be the way to go I suppose. In fact A-A combat is not so common or virtually non existent, but I think that in the virtual skies A-A is really needed :)
Other planes/helicopters that I would want to see in the future are bigger aircraft like the C130 or AC130, the awacs (E-3 or something), apache, ...
Protecting the sentry, escorting a c130 etc would be kinda cool.
Does anybody know how often DCS wants to release new planes? Is it their goal to make one plane every year or something?